Automatic nailing machine for nailing trim on door jambs



April 15, 1958 E. L. GUERRANT 2,830,296

AUTOMATIC NAILING MACHINE FOR NAILING TRIM ON DOOR JAMES 2 Sheets-Sheet 1 Filed Dec. 19, 1955 89 EDMONDS L. GIUERRANTO INVENTOR.

ATTORNEY AUTOMATIC NAILING MACHINE FOR NAILING TRIM ON DOOR JAMES Filed Dec. 19, 1955 2 Sheets-Sheet 2 'IIIII EDMONDS L. GUERRANT INVENTOR.

ATTQRNEY AUTOMATIC NAILING MACHINE FOR NAILING V TRIM ON noon JAMBS Edmonds L'Guerrant, Fort Worth, Tex.

December 19, 1955, Serial N0. 554,083

Application 3 Claims. ci. 1-149 This invention relates to automatic nailinglmachines and has reference to apparatus for nailing lengths of wood on opposite sides of another length of wood, for example, nailing trim or casing on door jamb s. The ex-' emplary form of the invention herein shown'and described has reference to nailing, but it is to be understood that stapling devices may be used in place of the nailing devices referred to in the presenfdescription.

An object of the invention ,is to provide a nailing machine for the described pur'pose which will'operate automatically once it is started and turn itself off after the lengths of wood referred to have been nailed together.

Another object of the invention is to pr'ovide guide means in an automatic nailing machine; and which guides I will permit the trim or casing to benailed. to the door jambs after the side jambs have beemnaile'd to a header jamb. Y

Another object of the invention"is to provide guides which will automatically set the reveal; that is, the distance that the edge of the trim is set back from the face of the jamb.

Another object is to provide trim or casing, guides which are adjustable for conventional widths, thicknesses and patterns of trim or casing.

Another object is to provide an automatic nailing rnachine for nailing trim on door jambs, and which machine accommodates door stop previously applied; however,-it is to be understood that the machine will operate without previously nailing the door stop in position.

Another object of the invention is to provide mountings for two or more opposingly arranged nailing or stapling devices, and which mountings may be set for varying thicknesses and patterns of door trim or casing, or to accommodate other varying dimensions.

Another object of the invention is to provide a locking mechanismfor holding the jamb and trim'guides in arrangement of one of the nailing device mountings.

whereby nails or staples may-be driven through the trim and into the jamb at an angle relative to the width of the latter. 5

The form of the invention shown includes a table 10, table top 11, a horizontal frame 12 beneath and supporting the table top, and legs 13 supporting the frame. There is a longitudinal slot 1'4 in the table top:11 to accommodate a feeding mechanism to be described. Ref erence is made to my copending application, Serial No. 540,896, filed October 17 1955, wherein a similanfeeding mechanism is described.

A feature of the invention sembly 15 for supporting and guiding the work pieces through the machine while the same are being nailed. A horizontalfiat work piece 16, such as a door. jamb,is. slidably positioned'on parallel horizontal spaced supports 17 secured to the upper ends of legs 18, which in'turn, are mounted on laterally adjustablebases l9. Bylmeans of slots in the bases 19 and boltsjztl, positioned therethrough, the horizontal supports 17 may be adjust'ed in wardly and outwardly accordingly-to the width of the. door jamb 16 to be nailed. The outer edges of the...

jamb supporting legs 18 are flush with the outer edges of supports 17 and provideinner guides for the casing or trim 2 1 to be nailed -to the side edges of the jamb 16.. A door stop '22 may or many not have. been pre- I viously nailed to the jamb face. i

The guide assembly 15 includes spaced parallel arm assemblies 23, each comprised of interlocking arms 24;

and 25 which, in' operating position, are in line with each other. Each interlocking arm 24 and 25 is pivotally position, yet providing for loading and unloading assembled or partially assembled door frames.

These and other objects-"will. become apparent from the following description and the accompanying drawings of an exemplary form of the invention, wherein:

Figure l is a broken side elevation of a nailing ma-' chine embodying the features of the invention, and showing a partially assembled door frame in position for nail ing side trim to a side jamb.

Figure 2 is an enlarged transverse sectional and elevational view taken approximately along line 22. of Fig ure 1.

Figure 3 is abroken perspective view of the locking mechanism. Figure 4 is a perspective view of the locking handle and T-bolt assembly forming a part thereof.

Figure 5 is a perspective view of a trim guide com- I prising a part of the present invention. 1

Figure 6 is a broken elevation of a work supporting guide particularly designed to support the end of a door frame or partially assembled door frame.

Figure 7 is a vertical sectional view showing a modified mounted above the table top bymeans of normally ver-,..

tical pivot arms 26 having pivotal connection .with upwardly projecting ears 27 and are pivotallyconnected theretoby means of pivot pins 28. The ears 27 are secured to the upper surface of the table top 11. Pairs of the pivot arms 26 at corresponding outer ends of the interlocking arms 24 and 25 are joinedby lower transverse nailing device brackets .29 for supporting inwardly directed nailing devices 30. Each bracket 29 has a de-- pending semicircular portion 31 intermediate its ends for receiving a circular portion of the nailing device 30. A similar and opposingly arranged holding member 32 engages the remaining circular portion. ofv the mailing device 30 and the extending ends of the holding members are secured to the outer ends of the. first described brackets 29 by means of screws 33. The nailing devices 30 are provided with noses or discharge ends 34 which extend to the upper outer edge of the trim 21-for driving nails'or staples 35 therethrough and into thejamb 16.

The interlocking arms 24 and 25 are provided with longitudinal slots 36-for adjustably supporting jamb and trim guides 37 and 38. The jamb guides 37 arelocated inwardly of the trim guides 38 and are mounted on the lower end of vertical studs 39 positioned through the slots 36 in the interlocking arms '24 and 25. The studs 39 are vertically adjustable by means of jamb nuts 40 located on opposite sides of said interlocking arms. Each jamb guide 37 is generally rectangular in shape and extends the distance between corresponding pairs of arms 24 and. 25. Each jamb guide 37 includes an outer depending flange-41 for slidably engaging the upper edge of the adjacent trim work piece 21, and by reason of this arrangement, the desired reveal a is provided on each side of the door jamb 16. The lower edges of the trim 21 are resiliently supported by means of spring loaded ball clamps 42 mounted on the adjustable bases 19. The trim guides 38 are comprised of lengths offelt'or the like and are engaged between upper and lower hold ing plates 43 and 44. The lower ends of vertical studs" Pat ented Apr. 15, 1958.

has to dowith a'guide as I trim guide 38, longitudinal patterns (not numbered) in t the outer surfaces of the trim 21 are accommodated.

The inner ends of the normally aligned interlocking arms 24 and 25 are provided with transverse upper and lower plates 48 and.49, thus joining the respective] arms on each side of the guide assembly 15 so that said pairs of arms will operate asintegral units. A vertical pin 50 is journaled in the center of the upper plate 48, and the upper end of which pin is provided with a laterally extending handleSl. Transverse spacers 52 and 53 of the same thickness as the arms 24 and 25 are secured to opposite edges and respective opposing surfaces of the plates 48 and 49 to provide turning spacefor a transverse locking plate 54 secured on theivertical pin 50. The lockingplate 54 is generally rectangular in shape 'but the ends'thereof are curved, as at 55 to provide cam surfaces for frictional coaction with a set screw 56 thre'adedly engaged in and extending through one of the spacers 53. There is an elongated opening57 in'the lower transverse plate 49 to accommodate a transverse or T-bolt 58 ,se cured to the lower end of the vertical locking pin 50. The distancebetweenthe locking plate 54 and theT-bolt 58 "is slightly greater than the thickness of lower plate 49. Thus, rotation of the vertical pin 50, by means of the handle 51, aligns the T-bolt 58 'with the openin 57 in the lower plate 49 and permits the bolt to pass there through. Further rotation of the handle 51 causesjthe locking plate 54 and Tbolt 58 to secure the guide assembly 15 in closed locking position. The aligned arms 24 are further secured by extending tongues 59 on the inner ends of corresponding said arms 25, and which tongues are received in the ends of the slots 36 of the coacting arms 24, as shown in Figure 3. The shaded area in Figure 3 represents the weld area joining the upper plate 48 with the arms 25.

As shown in Figure I, the jambs 16 of a door frame 60 may be assembled before applying the trim 21 by securing a temporary crating member 61 across the ends of the side jambs opposite the header; First one side jamb 21, and then the other, is mounted in the guide assembly 15 and acted upon by the present'device for securing the trim 21 in place. Subsequently, the header trim is applied in the same manner. The end of the partially assembled door frame 60 is supported by a work piece support 62 shown in Figures 1 and 6 and includes a vertical standard 63 having a transverse verticalvslot 64 in the upper end thereof. The standard 63 is located outwardly of the table 10 and in alignment'with the longitudinal center ofthe guide assembly 15. The Work piece support 62 is provided with a transverse jamb guide 65 on the upper end thereof and is in sliding contact with the lowersurface of the jamb 16 placed thereon. Spool type rollers 66 extend outwardly from the sides offthe standard 63 and are mounted on a shaft 67 extending through the vertical slot 64. Jamb nuts 68 on threads 69 provide vertical adjustment of the shaft 67 and whereby the spooltype roller 66 is in rolling contact with the lower edge of the trim 21 being acted upon.

The feeding mechanism 70, shown in Figures 1 and 2, is comprised of a reciprocating barbed gripper 71 on the upper end. of a gripper extension 72 extending through the slot 14 in the table top 11. The feeding mechanism includes a rod 73 slidablymounted beneath the table top 11 and parallel with the table slot 14. Suitable mountings, not shown,extend downwardly from the table top 11 for slidably supporting the rod 73. The lower end of the barbextension 72 is secured to a mounting block .74 having downwardly extending bell crank arms 75on-eachside thereof. The slidable rod 73 extends between the arms 75, beneath the mounting block 74 and between the bell crank arms 75, and a transverse pin 76 through said arms and said rod provide pivotal support for the said arms, mounting block, barb and extension. A double acting pneumatic piston actuating cylinder 78 is suspended at one end thereof to a horizontal bracket 79 between the work piece support 62 and the table 10. The cylinder 78 is suspended in place by means of a pivoted link 80 attached to the horizontal bracket 79. The piston rod 81 of the cylinder 78 is pivotally-connected with the downwardly extending ends of the bell crank arms 75 by means of a fitting 81 and a transverse pin 82 therethrough. Reciprocating actionis imparted to the feed mechanism 70 by separate pneumatic lines 83 connected with oppositc ends of the pneumatic cylinder 78. Similarly, pneumatic power is supplied to the nailing devices 30 by means of pneumatic lines 84. 7

An automatic cutoff arrangement 85 to the pneumatic system is provided between the pneumatic cylinder 78 and the guide assembly 15. The cutoff arrangement 85 is comprised of a vertical rod 86 slidably mounted through the table top 11 and has a roller 87 on the upper end thereof for providing rolling contact with the lower surface of the jamb 16. The vertical rod 86 is slidably mounted in a bracket 89 depending from the table top 11, and whichbracket has lateral projections 90 through which the rod 86 extends. A collar 91'is secured to the rod 86 between the bracket projections 90 and a coiled compressionspring 92 is mounted around said rod between the collar 91 and the lower lateral extension 90 for normally urging the rod upwardly. The lower end of the rod 86'is in contact with the vertically movable spring loaded stem, 93 of a cutoff valve 94 for the pneumatic system. The valve 94 is of the type that when the valve stem 93 is down the valve is open.

In operation, the guide assembly 15 is first opened by turning the handle51, and one end of the jamb 16 is positioned on the horizontal supports 17, after which the guide assembly is closed. The trim 21 is then positioned against the horizontal support legs 18 and on the resilient ball clamps 42 by sliding the same in place. If necessary, the jamb and trim guides 37 and 38 are adjusted against the work pieces 16 and 21 by means of their respective jamb nuts 40 and 47. v The opposing nailing devices 30 are preferably actuated simultaneously, such as by connecting pneumatic lines 84 between their control means and said nailing devices, thus driving nails 35 through the trim 21 and into the edges of the jamb 16, at which time the barb 71 of the feed mechanism 70 is either moving toward or is in its position nearest the air cylinder 78. The air cylinder 78 is then actuated in a direction, by suitable control means, to cause the piston rod 81 to move in a direction to cause the barb 71 to tilt upwardly and engage the lower horizontal surface of the jamb 16 and move the latter and its attached trim 21 a distance equal to the stroke of the cylinder. The action of the cylinder 78 is then reversed by applying pneumatic pressure at the opposite end of the cylinder, causing the barb 71 to tilt downwardly away from the work piece 16 and toward the cylinder 78. The nailing devices 30 are again actuated and the movement of the piston rod 81 and barb 71 is then repeated. After the jamb 16 passes beyond the contact with the roller 87 on the vertical rod- 86 the valve 94 is closed by reason of the upward movement of the rod and resulting upward movement of the spring loaded valve stem 93 thus automatically stopping further operation. After the trim 21 has been nailed to one length of the jamb 16, the guide arm assembly, 15 is-opened by means of the handle 51.

The nails 35 may be driven through the trim 21 and into the jamb 16 at an angle relative to the face of the latter by mountingthe nailing devices 30 at an angle on the hinged supporting legs 26. As shown in Figure 7, the outer edges 95 of the legs 26 may be downwardly and inwardly sloped so as to direct the discharge end 34 0f the nailing devices 36 upwardly and at an angle when the guide assembly 15 is in its closed position.

The invention is not limited to the construction herein shown and described, but may be made in many ways within the scope of the appended claims.

What is claimed is:

1. An automatic nailing machine for nailing trim on door jambs, said machine comprising: a horizontal jamb support, legs supporting said jamb support on opposite sides thereof, the outer edges of said legs being in aiigxrment with the outer edges of said jamb support, jamb guide means above and spaced from the upper surface of said jamb support a distance to accommodate the thickness of the jamb to be nailed, trim guides on the sides of and spaced from said outer edges of said legs a distance to accommodate the thickness of the trim to be nailed, nailing devices having their discharge ends opposingly positioned outwardly of but spaced between the plane defined by the upper surface of said jamb support and the lower portion of said jamb guide means, means actuating said nailing devices, means supporting said trim, and means slidably moving said jamb and said trim 6 lengthwise thereof through the space defined by said jamb support, said legs, said jamb guide means and said trim guides.

2. An automatic nailing machine for nailing trim on door jambs as defined in claim 1, and wherein said jamb guide means is comprised of separate jamb guide in side by side relation, arms adapted tobe positioned in end to end relation when said nailing machine is in operation, said arms being hingedly supported at their outer ends, means securing said jamb guides to said arms, and means locking said arms in their referred to aligned position.

3. An automatic nailing machine as defined in claim 2, and wherein said jamb guides include depending flanges positioned to slidably engage the upper edges of the jamb to be nailed and the adjoining edges of the trim to be nailed.

References Cited in the file of this patent UNITED STATES PATENTS 

